Change-speed gearing.



L. W. ANDERSON & A. R. MURRAY. CHAN GE SPEED GEARING. Prmouron FILED JAN. a, 190s.

94356-21. Patented Dec. 14,1909.

/IIIIIIIIIIIIII I N Wilm clllllrllvlilfllll LARZ W. ANDERSON AND ABIS'IIDESAR. MURRAY, 0F CINCINNATI, OHIO.

CHANGE-SPEED GEARING.

Specilcationof Letters Patent. Patented Dec. 14, 1909.

Application led January 3, 1908. Serial No. 409,215.

To all 'whom it may concern:

Beit known that we, LARz W. ANDERSON and Anrs'rmns R. MURRAY, both citizens of the United States, and residents of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Change-Speed Gearing, of whlch the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form part of our specification.

Our invention relates to change speed gearing and has for its-object theproduction of a simple and economical arrangement of gearing whereby several speeds may be readily and easily produced.

It also involves a new and improved inde mechanism whereby the several speeds provided by the gearingmay be obtained with accuracy/.and precision.

In the drawings ,-Figures l and 2 are respectively a side and rear elevation of the box containing our improved change gearing; Fig. 3 is a. vertical section through the same on an enlarged scale on the line 3--3 of Fig. l; Fig. et is a horizontal section through Fig. 2 on the line 4 4 thereof; and Fig. 5 is a similar section on the line 5--5 of Fig. 2. Figs. 3, 4 and 5 are all drawn on the same scale.

A indicates a portion of the vmachine to which the speed box is to be attached. B is the initial shaft of said machine, having bearing in a journal B( formed integral with the frame of the machine.

C is the speed box. The shaft B projects through the speed box, which is provided with a suitable housing or journal B to support it.

The speed box is supported on the journal B', prolonged for the purpose, the speed box having a housing B formed in its wall to embrace it, and by a bracket M, bolted to its under side and to the frame of the machine.

D is the driving shaft, and E a supplemental shaft, both suitably journaled in housings formed in the side Walls of the speed box C.

D is a pulley to which power is applied in order to drive the shaft D. A double slip gear d, vhaving sections d', d, is feathered to the shaft D. Gears e, c', which are keyed together, are keyed to shaft E. The one gear e is of a diameter adapted to mesh with the one section d of the slip gear d,

while'the gear e is of a diameter adapted to mesh with the section d. The two gears, c, e', are separated by a distance slightly greater than the total width of the slip gear (Z. A double slip gear b having the sections and b ,is feathered to the shaft B, and said sections are of a diameter adapted to mesh respectively, b with e and b with e. The total width of slip-gear b is substantially the same as the total width of the slip gear d.

The speed box contains a square opening in front to permit of access to the gears; but said opening is normally closed by an index plate F, which is secured to the speed box in any convenient manner, as by the screws f. Slots G and H are formed in the index plate opposite the shafts B and D, and parallel thereto. Yokes g and 71, travel respec tively in these slots, being supported by screws, washers, and knurled hand nuts, the same being lettered respectively, e', j, and is, and i', j and le. The yoke It embraces the double slip gear d and the yoke g embraces the double slip gear Z2. It is apparent that by means of the hand nuts the yokes, and with them, the slip gears, may be clamped in the desired position. The hand nuts also serve to move the slip gears to the desired` position, 'as well as to clamp them in place.

It is apparent from the drawings and the description, that by the arrangement described four speeds may be 'obtained. In order to properly indicate these speeds, We have provided the index plate with numerals and arrows indicated in Fig. 2. The arrangement of this index in the particular instance of our invention described .is as follows l The four speeds, beginning with the lowest, and ending with the highest, are numbered respectively, l, 2, 3, and 4. Lines are arranged connecting each position of the hand nuts le and k with ythe arrow heads at their ends, and each of these lines has a number as indicated. When the hand nuts are placed at the opposite ends of one'of these lines, the speed indicated by the numeral will be produced. For example, in the device as illustrated, the hand nuts are in the position to give the first or lowest l speed, being at opposite ends of the line marked l. To producethe second speed, the hand nut le would be left where it is and the nut 7c be brought to the end of` the line rthe lspeed desired.

marked 452,. This index card thus furnishes a very sure and simple method of producing Having thus descrlbed our invention what We desire to claim as new and to cover by 4 Letters Patent, is

In combination with the initial shaft of a machine and a journal for said shaft projecting beyond the outer Wall of said machine,' a speed box mounted on said journal,

- a bracket secured to the Wall of said machine supporting said speed box, a driving shaft,

and a shaft intermediate of said shafts, said yspeed box having bearings formed therein LARZ W. ANDERSON. ARISTDES R. MURRAY.

Witnesses:

P. G. MARCH, SAML. WHITE. 

